[Clang][NFCI] Remove records of unsatisfied atomic expressions in ConstraintSatisfaction (#98654)

This expression doesn't appear to be ever used, so let's remove it from
the data structure.

Fixed some spelling issues as well.

Author: zyn0217

clang/include/clang/AST/ASTConcept.h

@@ -53,11 +53,10 @@ class ConstraintSatisfaction : public llvm::FoldingSetNode {
   bool IsSatisfied = false;
   bool ContainsErrors = false;
 
-  /// \brief Pairs of unsatisfied atomic constraint expressions along with the
-  /// substituted constraint expr, if the template arguments could be
+  /// \brief The substituted constraint expr, if the template arguments could be
   /// substituted into them, or a diagnostic if substitution resulted in an
   /// invalid expression.
-  llvm::SmallVector<std::pair<const Expr *, Detail>, 4> Details;
+  llvm::SmallVector<Detail, 4> Details;
 
   void Profile(llvm::FoldingSetNodeID &ID, const ASTContext &C) {
     Profile(ID, C, ConstraintOwner, TemplateArgs);
@@ -69,7 +68,7 @@ class ConstraintSatisfaction : public llvm::FoldingSetNode {
 
   bool HasSubstitutionFailure() {
     for (const auto &Detail : Details)
-      if (Detail.second.dyn_cast<SubstitutionDiagnostic *>())
+      if (Detail.dyn_cast<SubstitutionDiagnostic *>())
         return true;
     return false;
   }
@@ -80,9 +79,7 @@ class ConstraintSatisfaction : public llvm::FoldingSetNode {
 /// substituted into them, or a diagnostic if substitution resulted in
 /// an invalid expression.
 using UnsatisfiedConstraintRecord =
-    std::pair<const Expr *,
-              llvm::PointerUnion<Expr *,
-                                 std::pair<SourceLocation, StringRef> *>>;
+    llvm::PointerUnion<Expr *, std::pair<SourceLocation, StringRef> *>;
 
 /// \brief The result of a constraint satisfaction check, containing the
 /// necessary information to diagnose an unsatisfied constraint.

clang/lib/AST/ASTConcept.cpp

@@ -19,35 +19,31 @@
 
 using namespace clang;
 
-namespace {
-void CreatUnsatisfiedConstraintRecord(
-    const ASTContext &C, const UnsatisfiedConstraintRecord &Detail,
-    UnsatisfiedConstraintRecord *TrailingObject) {
-  if (Detail.second.is<Expr *>())
-    new (TrailingObject) UnsatisfiedConstraintRecord{
-        Detail.first,
-        UnsatisfiedConstraintRecord::second_type(Detail.second.get<Expr *>())};
+static void
+CreateUnsatisfiedConstraintRecord(const ASTContext &C,
+                                  const UnsatisfiedConstraintRecord &Detail,
+                                  UnsatisfiedConstraintRecord *TrailingObject) {
+  if (Detail.is<Expr *>())
+    new (TrailingObject) UnsatisfiedConstraintRecord(Detail.get<Expr *>());
   else {
     auto &SubstitutionDiagnostic =
-        *Detail.second.get<std::pair<SourceLocation, StringRef> *>();
+        *Detail.get<std::pair<SourceLocation, StringRef> *>();
     unsigned MessageSize = SubstitutionDiagnostic.second.size();
     char *Mem = new (C) char[MessageSize];
     memcpy(Mem, SubstitutionDiagnostic.second.data(), MessageSize);
     auto *NewSubstDiag = new (C) std::pair<SourceLocation, StringRef>(
         SubstitutionDiagnostic.first, StringRef(Mem, MessageSize));
-    new (TrailingObject) UnsatisfiedConstraintRecord{
-        Detail.first, UnsatisfiedConstraintRecord::second_type(NewSubstDiag)};
+    new (TrailingObject) UnsatisfiedConstraintRecord(NewSubstDiag);
   }
 }
-} // namespace
 
 ASTConstraintSatisfaction::ASTConstraintSatisfaction(
     const ASTContext &C, const ConstraintSatisfaction &Satisfaction)
     : NumRecords{Satisfaction.Details.size()},
       IsSatisfied{Satisfaction.IsSatisfied}, ContainsErrors{
                                                  Satisfaction.ContainsErrors} {
   for (unsigned I = 0; I < NumRecords; ++I)
-    CreatUnsatisfiedConstraintRecord(
+    CreateUnsatisfiedConstraintRecord(
         C, Satisfaction.Details[I],
         getTrailingObjects<UnsatisfiedConstraintRecord>() + I);
 }
@@ -58,7 +54,7 @@ ASTConstraintSatisfaction::ASTConstraintSatisfaction(
       IsSatisfied{Satisfaction.IsSatisfied},
       ContainsErrors{Satisfaction.ContainsErrors} {
   for (unsigned I = 0; I < NumRecords; ++I)
-    CreatUnsatisfiedConstraintRecord(
+    CreateUnsatisfiedConstraintRecord(
         C, *(Satisfaction.begin() + I),
         getTrailingObjects<UnsatisfiedConstraintRecord>() + I);
 }

clang/lib/Sema/SemaConcept.cpp

@@ -273,7 +273,6 @@ calculateConstraintSatisfaction(Sema &S, const Expr *ConstraintExpr,
     char *Mem = new (S.Context) char[MessageSize];
     memcpy(Mem, DiagString.c_str(), MessageSize);
     Satisfaction.Details.emplace_back(
-        ConstraintExpr,
         new (S.Context) ConstraintSatisfaction::SubstitutionDiagnostic{
             SubstitutedAtomicExpr.get()->getBeginLoc(),
             StringRef(Mem, MessageSize)});
@@ -302,8 +301,7 @@ calculateConstraintSatisfaction(Sema &S, const Expr *ConstraintExpr,
          "evaluating bool expression didn't produce int");
   Satisfaction.IsSatisfied = EvalResult.Val.getInt().getBoolValue();
   if (!Satisfaction.IsSatisfied)
-    Satisfaction.Details.emplace_back(ConstraintExpr,
-                                      SubstitutedAtomicExpr.get());
+    Satisfaction.Details.emplace_back(SubstitutedAtomicExpr.get());
 
   return SubstitutedAtomicExpr;
 }
@@ -393,9 +391,8 @@ static ExprResult calculateConstraintSatisfaction(
             char *Mem = new (S.Context) char[MessageSize];
             memcpy(Mem, DiagString.c_str(), MessageSize);
             Satisfaction.Details.emplace_back(
-                AtomicExpr,
                 new (S.Context) ConstraintSatisfaction::SubstitutionDiagnostic{
-                        SubstDiag.first, StringRef(Mem, MessageSize)});
+                    SubstDiag.first, StringRef(Mem, MessageSize)});
             Satisfaction.IsSatisfied = false;
             return ExprEmpty();
           }
@@ -1056,13 +1053,14 @@ static void diagnoseUnsatisfiedRequirement(Sema &S,
                                            concepts::NestedRequirement *Req,
                                            bool First) {
   using SubstitutionDiagnostic = std::pair<SourceLocation, StringRef>;
-  for (auto &Pair : Req->getConstraintSatisfaction()) {
-    if (auto *SubstDiag = Pair.second.dyn_cast<SubstitutionDiagnostic *>())
+  for (auto &Record : Req->getConstraintSatisfaction()) {
+    if (auto *SubstDiag = Record.dyn_cast<SubstitutionDiagnostic *>())
       S.Diag(SubstDiag->first, diag::note_nested_requirement_substitution_error)
-          << (int)First << Req->getInvalidConstraintEntity() << SubstDiag->second;
+          << (int)First << Req->getInvalidConstraintEntity()
+          << SubstDiag->second;
     else
-      diagnoseWellFormedUnsatisfiedConstraintExpr(
-          S, Pair.second.dyn_cast<Expr *>(), First);
+      diagnoseWellFormedUnsatisfiedConstraintExpr(S, Record.dyn_cast<Expr *>(),
+                                                  First);
     First = false;
   }
 }
@@ -1176,12 +1174,11 @@ static void diagnoseWellFormedUnsatisfiedConstraintExpr(Sema &S,
       << (int)First << SubstExpr;
 }
 
-template<typename SubstitutionDiagnostic>
+template <typename SubstitutionDiagnostic>
 static void diagnoseUnsatisfiedConstraintExpr(
-    Sema &S, const Expr *E,
-    const llvm::PointerUnion<Expr *, SubstitutionDiagnostic *> &Record,
+    Sema &S, const llvm::PointerUnion<Expr *, SubstitutionDiagnostic *> &Record,
     bool First = true) {
-  if (auto *Diag = Record.template dyn_cast<SubstitutionDiagnostic *>()){
+  if (auto *Diag = Record.template dyn_cast<SubstitutionDiagnostic *>()) {
     S.Diag(Diag->first, diag::note_substituted_constraint_expr_is_ill_formed)
         << Diag->second;
     return;
@@ -1196,8 +1193,8 @@ Sema::DiagnoseUnsatisfiedConstraint(const ConstraintSatisfaction& Satisfaction,
                                     bool First) {
   assert(!Satisfaction.IsSatisfied &&
          "Attempted to diagnose a satisfied constraint");
-  for (auto &Pair : Satisfaction.Details) {
-    diagnoseUnsatisfiedConstraintExpr(*this, Pair.first, Pair.second, First);
+  for (auto &Record : Satisfaction.Details) {
+    diagnoseUnsatisfiedConstraintExpr(*this, Record, First);
     First = false;
   }
 }
@@ -1207,8 +1204,8 @@ void Sema::DiagnoseUnsatisfiedConstraint(
     bool First) {
   assert(!Satisfaction.IsSatisfied &&
          "Attempted to diagnose a satisfied constraint");
-  for (auto &Pair : Satisfaction) {
-    diagnoseUnsatisfiedConstraintExpr(*this, Pair.first, Pair.second, First);
+  for (auto &Record : Satisfaction) {
+    diagnoseUnsatisfiedConstraintExpr(*this, Record, First);
     First = false;
   }
 }

clang/lib/Sema/SemaTemplate.cpp

@@ -4250,10 +4250,10 @@ TemplateParameterList *Sema::MatchTemplateParametersToScopeSpecifier(
 
     // C++ [temp.expl.spec]p16:
     //   In an explicit specialization declaration for a member of a class
-    //   template or a member template that ap- pears in namespace scope, the
+    //   template or a member template that appears in namespace scope, the
     //   member template and some of its enclosing class templates may remain
     //   unspecialized, except that the declaration shall not explicitly
-    //   specialize a class member template if its en- closing class templates
+    //   specialize a class member template if its enclosing class templates
     //   are not explicitly specialized as well.
     if (ParamIdx < ParamLists.size()) {
       if (ParamLists[ParamIdx]->size() == 0) {

clang/lib/Serialization/ASTReaderStmt.cpp

@@ -793,16 +793,15 @@ readConstraintSatisfaction(ASTRecordReader &Record) {
   if (!Satisfaction.IsSatisfied) {
     unsigned NumDetailRecords = Record.readInt();
     for (unsigned i = 0; i != NumDetailRecords; ++i) {
-      Expr *ConstraintExpr = Record.readExpr();
       if (/* IsDiagnostic */Record.readInt()) {
         SourceLocation DiagLocation = Record.readSourceLocation();
         std::string DiagMessage = Record.readString();
         Satisfaction.Details.emplace_back(
-            ConstraintExpr, new (Record.getContext())
-                                ConstraintSatisfaction::SubstitutionDiagnostic{
-                                    DiagLocation, DiagMessage});
+            new (Record.getContext())
+                ConstraintSatisfaction::SubstitutionDiagnostic(DiagLocation,
+                                                               DiagMessage));
       } else
-        Satisfaction.Details.emplace_back(ConstraintExpr, Record.readExpr());
+        Satisfaction.Details.emplace_back(Record.readExpr());
     }
   }
   return Satisfaction;

clang/lib/Serialization/ASTWriterStmt.cpp

@@ -474,14 +474,12 @@ addConstraintSatisfaction(ASTRecordWriter &Record,
   if (!Satisfaction.IsSatisfied) {
     Record.push_back(Satisfaction.NumRecords);
     for (const auto &DetailRecord : Satisfaction) {
-      Record.writeStmtRef(DetailRecord.first);
-      auto *E = DetailRecord.second.dyn_cast<Expr *>();
-      Record.push_back(E == nullptr);
+      auto *E = DetailRecord.dyn_cast<Expr *>();
+      Record.push_back(/* IsDiagnostic */ E == nullptr);
       if (E)
         Record.AddStmt(E);
       else {
-        auto *Diag = DetailRecord.second.get<std::pair<SourceLocation,
-                                                       StringRef> *>();
+        auto *Diag = DetailRecord.get<std::pair<SourceLocation, StringRef> *>();
         Record.AddSourceLocation(Diag->first);
         Record.AddString(Diag->second);
       }